Retrieving the icon of a file in C#

To get the associated icon of a file simply use the below code
 
 Icon fileicon = Icon.ExtractAssociatedIcon(@"c:\example.txt");

//set the icon of our Form to the specified icon
this.Icon = fileicon;

To show the icon in a PictureBox (eg:-pictureBox1) convert it to bitmap as given below

pictureBox1.Image = fileicon.ToBitmap();

we can obtain the icon of an 'exe' file using the above method.